20677903919 has 2 divisors, whose sum is σ = 20677903920. Its totient is φ = 20677903918.

The previous prime is 20677903859. The next prime is 20677903921. The reversal of 20677903919 is 91930977602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20677903919 - 2⁸ = 20677903663 is a prime.

It is a super-2 number, since 2×20677903919² (a number of 21 digits) contains 22 as substring.

Together with 20677903921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20677903949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10338951959 + 10338951960.

It is an arithmetic number, because the mean of its divisors is an integer number (10338951960).

Almost surely, 2^20677903919 is an apocalyptic number.

20677903919 is a deficient number, since it is larger than the sum of its proper divisors (1).

20677903919 is an equidigital number, since it uses as much as digits as its factorization.

20677903919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1285956, while the sum is 53.

The spelling of 20677903919 in words is "twenty billion, six hundred seventy-seven million, nine hundred three thousand, nine hundred nineteen".